It's Testor's enamel from the hobby shop, Rustoleum paint for plastics from Home Depot and some other Rustoleum spray paint that didn't melt the foam. Actually whatever came to hand from a shelf full of the stuff. The white lines are done with a white paint Sharpie.

samson - nice vid man, thanks for posting. Looks like you've got her dialed in perfectly! Can I ask you what your complete setup is and what she weighs in at?
Oh, and nice decision to pull her in at the last moment there, looks like the lift died and the water was calling her in. Many (me) would have turned out hoping for that last updraft, and ended up in the drink!